SN75C1167N Equivalent & Substitute Parts

Part Overview

The SN75C1167N is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in a 16-pin DIP package. This component is classified as obsolete, though 5192 units remain available in stock. The obsolete status necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility while accommodating modern packaging and operational specifications.

Substiute Parts

SN75C1167N

Texas InstrumentsIn Stock: 5204SN75C1167N Datasheet

Current PartRFQ

SN65C1167ENSR

Texas InstrumentsIn Stock: 9568SN65C1167ENSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75C1167N is determined by the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support RS422 and RS485 protocols
• Driver/Receiver Configuration: 2/2 configuration (2 drivers, 2 receivers) is required
• Receiver Hysteresis: 60 mV specification must be maintained
• Supply Voltage Range: 4.5V ~ 5.5V compatibility is mandatory
• Electrical Characteristics: Functional equivalence in signal processing and impedance matching

The SN65C1167ENSR qualifies as a manufacturer-recommended substitute. While it introduces differences in duplex mode (full vs. half), mounting type (surface mount vs. through hole), and operating temperature range, the core electrical parameters and protocol support remain compatible for most applications requiring RS422/RS485 transceiver functionality.

Parameter Comparison

Engineering Selection Recommendations

The SN65C1167ENSR is the manufacturer-recommended substitute for the obsolete SN75C1167N. Selection criteria are based on the following factors:

• Product Status: The SN65C1167ENSR maintains active production status, ensuring long-term availability and supply chain continuity
• Compliance: Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Electrical Equivalence: Core transceiver functionality, protocol support, and receiver hysteresis specifications are identical
• Temperature Range Enhancement: The substitute provides an extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C), suitable for broader environmental applications
• Package Transition: Migration from through-hole DIP to surface-mount SOIC packaging requires PCB redesign but aligns with modern manufacturing practices

For applications constrained to through-hole mounting or legacy board designs, the SN75C1167N remains available in existing inventory. For new designs and production transitions, the SN65C1167ENSR is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the SN65C1167ENSR directly replace the SN75C1167N in existing designs?

A: Electrical substitution is possible due to identical protocol support, driver/receiver configuration, and receiver hysteresis. However, package differences (16-DIP vs. 16-SOIC) require PCB layout modifications. The full-duplex capability of the substitute provides additional functionality beyond the half-duplex original.

Q: What is the significance of the duplex mode difference?

A: The SN75C1167N operates in half-duplex mode, allowing either transmission or reception at any given time. The SN65C1167ENSR operates in full-duplex mode, enabling simultaneous transmission and reception. Full-duplex operation is compatible with half-duplex applications but provides enhanced capability for bidirectional communication protocols.

Q: Are there mounting considerations for the substitute part?

A: Yes. The SN75C1167N uses through-hole DIP mounting suitable for breadboards and legacy PCBs. The SN65C1167ENSR requires surface-mount assembly on modern PCBs. This transition necessitates updated manufacturing processes and equipment.

Q: Do both parts support the same supply voltage?

A: Yes. Both the SN75C1167N and SN65C1167ENSR operate within the 4.5V ~ 5.5V supply voltage range, ensuring compatibility with standard 5V logic systems.

Q: What is the impact of the extended temperature range in the substitute?

A: The SN65C1167ENSR supports -40°C ~ 85°C operation compared to the original 0°C ~ 70°C range. This extended specification accommodates industrial and automotive applications requiring broader thermal performance without additional design modifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN75C1167N and SN65C1167ENSR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.